Tacoma won’t start

I have already done research, still can’t solve my truck’s issue.

07 Tacoma double cab 4x4 supercharged

I flipped an auxiliary switch (aftermarket) while my truck was on. A/c shut off and dash board lit up. I turned the truck off and tried to start it again, won’t even turn over.

What I have tried so far:
1. Jump start
2. Checked all fuses, none are bad.
3. Tried disconnecting battery terminal and reconnecting.
4. Connected scanner, no codes

please let me know of any suggestions,
Thank you!

 

We've seen it 237 times.

"I've checked all the fuses"

"Did you check the ______ fuse?"

"Doh! It's blown"

Did you check ALL the fuses in BOTH fuse boxes?

 

Yes I have.

 

Not a second gen, but I recently had a similar issue due to the alarm system the dealer installed. Ended up blowing one of the mini J-case fuses. They are tough to check visually so run over everything with a multimeter. Best of luck

 

What is the Auxiliary switched wired to? If it's a light bar or such, what did you tap into for power? That'll help figure out which system may be the culprit. I second @badfish_55 in checking the mini j-case fuses.

 

Turn the key on and check for voltage on both sides of 10A IG1, 10A IG1NO2 and 15A IGN fuses. Once you check that, you can go upstream or downstream from there.

If power is good there, turn the key to crank and check both sides of 7.5A STA fuse

 

it was wired to a light bar which is no longer in the truck. I didn’t do the wiring so I’ve had to do some investigative work. It appears the switch was connected to the EFI No.2 fuse? I checked the fuse and it is not damaged. I swapped it Just in case but still won’t turn over.

 

Check for voltage at the fuses I mentioned! EFI NO2 has nothing to do with the starter circuit.

 

Are you getting power to the fuses?
How are you checking the fuses?

 

ok I’ll check tomorrow. I left it at my friends house. Thanks!

 

checking with a volt circuit tester

 

Are checking for power or just continuity between the fuse terminals?